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the first manned attempt was made by the montogolifier brothers joseph and etienne
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john fitch made first successful trail of forty five-foot steamboat down the delaware river in the pressence of the members of the constitutional convention
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samuel homfray funded development of steam powered vehicle to replace horse drawn carts.
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richard trevithic built the first steam engine locomotive.
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john stevens is considered the father of the american railroads
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cars buses trucks came into use
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the first space shuttle launch
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on sept 11, 2001 terrisists flew three airplanes into the twin towers
